I found a kit like what Rich shows on eBay from a Toyota dealer. It came with a new switch, the harness, and they provided wiring diagrams (for a FJ, but it shows you the pins). I'd definitely get the kit like Rich shows, even if you cut it up. You need the plug on the back. You can buy the plug separately from Toyota, but then you have to buy "repair wires" that go in the plug, which can range to a couple of bucks to $15 PER WIRE.